(Can confirm I visually verified all of these and specifically took a look at whether the credits were Muoi or Moui to ensure accuracy of the credit... also, it's awesome we no longer have to worry about parsing... whereas the credits for Buffy and Indecent are the same, Nip/Tuck actually makes a point of separating the name exactly as Chi//Muoi Lo using the slashes and everything ).

He appears (uncredited) in an episode of the third season of 'Quantum Leap'. Apparently, that particular profile omits the (uncredited)-tag, but he really doesn't get a credit on-screen. On first glimpse, it seems that's not the only error in the cast/crew data in that particular profile...